Analysis Of Load And Vibration Characteristics Of High Performance Spiral Bevel Gears

Spiral bevel gears have the advantages of large contact ratio,smooth transmission,and high loading capacity.They have been widely used in automobiles,tractors,aircrafts and other equipment.With the development of industrial technology,spiral bevel gears with high speed,heavy load and low noise have gradually becoming a research direction.As a key component of power transmission,the load capacity and vibration and other performance of the system can be directly affected by the meshing quality,so it is particularly important to perform mechanical analysis on spiral bevel gears.Contact pattern and transmission errors are important indicators for measuring the performance of gear meshing,while vibration speed and acceleration are important indicators for measuring the performance of gear vibration.Based on the rapid development of computer technology,the cost of design and materials can be significantly reduced through finite element analysis technology,which has been widely used in many engineering fields.The tooth shape of spiral bevel gear is very complex,so it is difficult to obtain an accurate three-dimensional model,resulting in a large error after importing the finite element software.How to obtain gear-related performance parameters with high accuracy has always been a concern of many scholars.The main research results and innovations of this paper are as follows:1.The tooth surface equation is derived through the geometric parameters and processing parameters of the spiral bevel gear,and the grid points coordinates of tooth surface are accurately calculated in conjunction with the grid density requires.At the same time,the stress concentration phenomenon of the tooth root transition curve is considered to encrypt the part of the mesh of the tooth root.First calibrate the positioning point of the tooth thickness,then the finite element model of the gear tooth with accurate tooth thickness is established by importing the finite element software directly.Through gear tooth contact analysis,an accurate finite element model of spiral bevel gear meshing transmission is established.The assembly tooth pair obtained by this method has good mesh quality and high model accuracy.2.Take two pairs of different contact traces and two pairs of spiral bevel gears with different geometric transmission errors as examples.According to the TCA results,through the general finite element software ABAQUS batch processing function,the loaded tooth contact analysis is performed to obtain the contact stress and loaded transmission error.Based on the modal superposition method,the vibration response analysis of the spiral bevel gears was used to obtain the vibration speed and acceleration.Which high-performance spiral bevel gears has better load and vibration characteristics is discussed,and it provides a reference for the future design of high-performance spiral bevel gears.3.Gleason spiral bevel gear design software is used to design a set of highperformance spiral bevel gears.Through reverse modeling,the ABAQUS software is imported for simulation analysis,and the contact marks and loaded transmission errors are obtained.The Gleason 600 HC spiral bevel gear milling machine and Gleason 600 HG spiral bevel gear grinding machine are used to cut the designed gears.The tooth surface and pitch errors of the processed gear are detected by the Gleason 650 GMS to ensure that the machining errors meet the design requirements.Then the contact pattern is obtained by rolling test on the machine.At the same time,the FEA module of Gleason spiral bevel gear design software is used for simulation analysis to obtain the loaded transmission error.Finally,the comparison of the simulation results of the ABAQUS and FEA modules and the experimental verification of the gear rolling test prove that the simulation results of ABAQUS are accurate and reliable.